Light guide module having embedded LED

Abstract

A light guide module of optical mouse is disclosed. The light guide module comprises a LED die within a light guide input of light guide means. The light guide input comprises an internal paraboloid. Light emitted by the LED die and parallel reflected from the paraboloid is impinged on a light guide output.

1 . A light guide module of an optical mouse, comprising: 
 a LED die; and    light guide means including a light guide input, a light guide output, and an optical path between the light guide input and the light guide output,    wherein the LED die is disposed in the light guide input of the light guide means, and light emitted from the LED die is guided to the light guide output via the optical path.    
   
   
       2 . The light guide module as claimed in  claim 1 , wherein the light guide input comprises an internal curve surface for impinging light emitted by the LED die and reflected from the curve surface on the light guide output via the optical path.  
   
   
       3 . The light guide module as claimed in  claim 2 , wherein the curve surface is a paraboloid.  
   
   
       4 . The light guide module as claimed in  claim 3 , wherein the LED die is located at a focus of the paraboloid.  
   
   
       5 . The light guide module as claimed in  claim 3 , further comprising a reflective film coated or formed on the paraboloid.  
   
   
       6 . The light guide module as claimed in  claim 5 , wherein the reflective film is opaque.